分析OTFS在有限块长下的中断概率，为实际系统设计提供理论依据。
Outage Probability Analysis for OTFS with Finite Blocklength
- 将OTFS中断概率问题转化为并行高斯信道的等效问题
- 推导出平均功率与水填策略下中断概率的下界
- 通过蒙特卡洛仿真验证结果，适用于高速无线系统设计
正交时频空间（OTFS）调制被广泛认为是未来无线通信网络的有前途波形。为提供实际系统设计的洞察，本文分析了具有有限块长的OTFS调制的中断概率。首先，构建系统模型，并将有限块长下OTFS的中断概率分析转化为并行加性高斯白噪声（AWGN）信道上有限块长中断概率的等效问题。随后，采用等效噪声方法，分别推导了平均功率分配和水填功率分配策略下OTFS有限块长中断概率的下界。最后，利用蒙特卡洛方法确定两种功率分配策略下的中断概率下界。分析了可分辨路径数和编码速率对中断概率的影响，并将仿真结果与理论下界进行比较。
原文摘要 · Abstract (English)
Orthogonal time frequency space (OTFS) modulation is widely acknowledged as a prospective waveform for future wireless communication networks.To provide insights for the practical system design, this paper analyzes the outage probability of OTFS modulation with finite blocklength.To begin with, we present the system model and formulate the analysis of outage probability for OTFS with finite blocklength as an equivalent problem of calculating the outage probability with finite blocklength over parallel additive white Gaussian noise (AWGN) channels.Subsequently, we apply the equivalent noise approach to derive a lower bound on the outage probability of OTFS with finite blocklength under both average power allocation and water-filling power allocation strategies, respectively.Finally, the lower bounds of the outage probability are determined using the Monte-Carlo method for the two power allocation strategies.The impact of the number of resolvable paths and coding rates on the outage probability is analyzed, and the simulation results are compared with the theoretical lower bounds.
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